Missing Email+Accounts? (Build 10052)

Well, I was messing around with the new mail app available with build 10052 and while setting up my work email, entered the account name wrongly. That triggered "Your so and so account requires attention" notification and to my utmost surprise, clicking the same produced me the legacy "Emails+Accounts" screen, through which I was able to modify the settings for my corporate mail.
Further dwelling using the "People legacy" application, I realized I can easily add all supported email accounts without using the "mail" app!